Raise EOFError during process.recv when stdout closes on Windows (#2524)

* Windows: Raise EOFError during process.recv when stdout closes

If the receiving thread terminates while we're waiting for data to arrive we'd be waiting endlessly. Raise EOFError when .recv()ing on a process with stdout closed and no more data queued up from the receiver thread.

* Update CHANGELOG

CHANGELOG.md

@@ -76,9 +76,11 @@ The table below shows which release corresponds to each branch, and what date th
 
 - [#2507][2507] Add `+LINUX` and `+WINDOWS` doctest options and start proper testing on Windows
 - [#2522][2522] Support starting a kitty debugging window with the 'kitten' command
+- [#2524][2524] Raise EOFError during `process.recv` when stdout closes on Windows
 
 [2507]: https://github.com/Gallopsled/pwntools/pull/2507
 [2522]: https://github.com/Gallopsled/pwntools/pull/2522
+[2524]: https://github.com/Gallopsled/pwntools/pull/2524
 
 ## 4.15.0 (`beta`)
 - [#2508][2508] Ignore a warning when compiling with asm on nix

pwnlib/tubes/process.py

@@ -767,9 +767,13 @@ def can_recv_raw(self, timeout):
 
         if IS_WINDOWS:
             with self.countdown(timeout=timeout):
-                while self.timeout and self._read_queue.empty():
+                while self.timeout and self._read_queue.empty() and self._read_thread.is_alive():
                     time.sleep(0.01)
-                return not self._read_queue.empty()
+                if not self._read_queue.empty():
+                    return True
+                if not self._read_thread.is_alive():
+                    raise EOFError
+                return False
 
         try:
             if timeout is None: